HCLTech Senior Software Developer Interview Questions and Answers

I am a Senior Software Developer with 8 years of experience in full-stack development, specializing in Java and Angular.

• 8 years of experience in full-stack development

• Specialize in Java and Angular

• Strong problem-solving skills

• Experience with Agile methodologies

• Excellent communication and teamwork abilities

The yield() method in threading is used to give up the CPU and allow other threads to run.

• Allows other threads to run by giving up the CPU temporarily

• Useful for preventing one thread from dominating the CPU

• Can be used to implement cooperative multitasking

Hash collision occurs when two different inputs produce the same hash value. It can be handled by using techniques like chaining or open addressing.

• Hash collision is a common issue in hash tables where different keys produce the same hash value.

• One way to handle hash collisions is by using chaining, where each bucket in the hash table stores a linked list of key-value pairs with the same hash value.

• Another way to handl...read more

Method references provide a more concise way to refer to methods by name instead of using lambda expressions.

• Method references can make code more readable and maintainable by reducing boilerplate code.

• They can be used to refer to static methods, instance methods, and constructors.

• Example: list.forEach(System.out::println) is equivalent to list.forEach(item -> System.out.println(item)).

Vertical scaling increases the capacity of a single server, while horizontal scaling adds more servers to distribute the load.

• Vertical scaling involves increasing the resources of a single server, such as CPU, RAM, or storage.

• Horizontal scaling involves adding more servers to distribute the load, often done through containerization or virtualization.

• Vertical scaling is limited by the capacity of a single server, while ...read more

Java program to capitalize first letter of each word in a given string

• Split the input string by space to get individual words

• Iterate through each word and capitalize the first letter

• Join the words back together to form the final capitalized string

Escalation matrix defines the process for escalating production defects based on severity and impact.

• Escalation matrix typically includes levels of escalation, responsible parties at each level, and criteria for escalating defects.

• For example, a Level 1 escalation may involve the development team, while a Level 2 escalation may involve senior management.

• Criteria for escalation may include severity of the defect, impact...read more

Implemented a real-time data synchronization feature between multiple servers.

• Designed a custom protocol for efficient data transfer

• Implemented server-side logic to handle data conflicts

• Utilized websockets for real-time communication

Yes, I have the ability to handle tasks individually.

• I have a proven track record of successfully completing projects on my own.

• I am self-motivated and can prioritize tasks effectively.

• I have strong problem-solving skills which allow me to tackle challenges independently.

Yes, it is okay to give deliverables under pressure as long as quality is not compromised.

• Meeting deadlines is important in software development.

• Pressure can sometimes lead to increased focus and productivity.

• Communication with stakeholders about realistic timelines is key.

• Prioritizing tasks and managing time effectively can help in delivering under pressure.

I am a Senior Software Developer with 8 years of experience in developing web applications using various technologies.

• Experienced in full stack development

• Proficient in languages like Java, JavaScript, and Python

• Skilled in using frameworks like Spring, React, and Django

• Strong understanding of database management systems

• Familiar with Agile development methodologies

Seeking new challenges and growth opportunities.

• Desire for career advancement

• Looking for new challenges

• Seeking better work-life balance

• Company restructuring or changes in management

My current CTC is $100,000 and my expected CTC is $120,000.

• Current CTC: $100,000

• Expected CTC: $120,000

Yes, I have all relevant documents from previous companies.

• I have copies of offer letters, employment contracts, and performance reviews.

• I also have any relevant certifications or training records.

• I can provide references from previous employers if needed.

Snowflake is a cloud-based data warehousing platform that separates storage and compute, allowing for scalable and efficient data processing.

• Snowflake uses a unique architecture that separates storage and compute resources, enabling on-demand scaling for both without any manual intervention.

• It supports multiple data types and semi-structured data like JSON, Avro, Parquet, etc.

• Snowflake offers automatic optimization of ...read more

Clustering is a technique used in data mining to group similar data points together based on certain criteria.

• Clustering is an unsupervised machine learning technique.

• It is used to discover hidden patterns or structures in data.

• Examples include K-means clustering, hierarchical clustering, and DBSCAN.

Basic SQL codes include SELECT, INSERT, UPDATE, DELETE.

• SELECT statement retrieves data from a database

• INSERT statement adds new records to a table

• UPDATE statement modifies existing records in a table

• DELETE statement removes records from a table

Domain Driven Design is an approach to software development that focuses on the core domain and domain logic.

• Focuses on understanding and modeling the core domain of the software

• Emphasizes collaboration between domain experts and developers

• Encourages the use of a common language to bridge the communication gap between technical and non-technical stakeholders

• Promotes the use of domain models to capture and express the c...read more

Use SQL query with window function to find third highest salary of an employee.

• Use ROW_NUMBER() function to assign a unique row number to each record based on salary in descending order

• Filter the result where row number is 3 to get the third highest salary

To find the average salary of employees in a particular department, calculate the total salary of all employees in that department and divide by the number of employees.

• Retrieve the salary of all employees in the particular department

• Calculate the total salary by summing up all individual salaries

• Divide the total salary by the number of employees to get the average salary

Remote Attribute is used in ASP.NET MVC to validate that a property value is valid when the property is posted to the server.

• Used in ASP.NET MVC for client-side validation

• Validates that a property value is valid when posted to the server

• Can be used to check if a property value is unique in the database

include() is a PHP function used to include and evaluate a specified file.

• include() is used to include and evaluate a specified file in PHP code.

• It is commonly used to include reusable code snippets or libraries.

• The included file is processed as if it were part of the calling file.

• If the file cannot be included, a warning is generated but the script will continue to execute.